1. Harry Ransom Center, MS 3327, Container 196 Bookmark DS ID: DS3982 Title: Papal bull Author: Sixtus IV Place: Italy and Rome Date: 1474 February 7
2. University of California, Berkeley, BANC MS UCB 283 Bookmark DS ID: DS12417 Title: Papal letter Author: Catholic Church and Urban VIII Place: Rome and Italy Date: 1632?